package com.jredu.util;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class TestMyCallable {

	public static void main(String[] args) throws ExecutionException, InterruptedException {
		System.out.println("----程序开始运行----");
		Date date1 = new Date();

		int taskSize = 5;
		// 创建一个线程池
		ExecutorService pool = Executors.newFixedThreadPool(taskSize);
		// 创建多个有返回值的任务
		List<Future> list = new ArrayList<Future>();
		for (int i = 0; i < taskSize; i++) {
			Callable c = new MyCallable(i + " ");
			// 执行任务并获取Future对象
			Future f = pool.submit(c);
			// System.out.println(">>>" + f.get().toString());
			list.add(f);
		}
		// 关闭线程池
		pool.shutdown();

		// 获取所有并发任务的运行结果
		for (Future f : list) {
			// 从Future对象上获取任务的返回值，并输出到控制台
			System.out.println(">>>" + f.get().toString());
		}

		Date date2 = new Date();
		System.out.println("----程序结束运行----，程序运行时间【" + (date2.getTime() - date1.getTime()) + "毫秒】");
	}

}
